1 files changed, 146 insertions, 0 deletions
diff --git a/auth_sqlite3.go b/auth_sqlite3.go
new file mode 100644
index 0000000..02a3de4
--- /dev/null
+++ b/auth_sqlite3.go
@@ -0,0 +1,146 @@
+package main
+
+import (
+	"database/sql"
+	"time"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+type authSQLite3 struct {
+	db *sql.DB
+}
+
+func (a authSQLite3) Exists(name string) bool {
+	if err := a.init(); err != nil {
+		return false
+	}
+	defer a.close()
+
+	var name2 string
+	err := a.db.QueryRow(`SELECT name FROM user WHERE name = ?;`, name).Scan(&name2)
+	return err == nil
+}
+
+func (a authSQLite3) Passwd(name string) (salt, verifier []byte, err error) {
+	if err = a.init(); err != nil {
+		return
+	}
+	defer a.close()
+
+	a.db.QueryRow(`SELECT salt, verifier FROM user WHERE name = ?;`, name).Scan(&salt, &verifier)
+	a.updateTimestamp(name)
+	return
+}
+
+func (a authSQLite3) SetPasswd(name string, salt, verifier []byte) error {
+	if err := a.init(); err != nil {
+		return err
+	}
+	defer a.close()
+
+	_, err := a.db.Exec(`REPLACE INTO user (name, salt, verifier) VALUES (?, ?, ?);`, name, salt, verifier)
+	if err != nil {
+		return err
+	}
+
+	a.updateTimestamp(name)
+	return nil
+}
+
+func (a authSQLite3) Timestamp(name string) (time.Time, error) {
+	if err := a.init(); err != nil {
+		return time.Time{}, err
+	}
+	defer a.close()
+
+	var tstr string
+	err := a.db.QueryRow(`SELECT timestamp FROM user WHERE name = ?;`, name).Scan(&tstr)
+	if err != nil {
+		return time.Time{}, err
+	}
+
+	return time.Parse("2006-01-02 15:04:05", tstr)
+}
+
+func (a authSQLite3) Import(in []user) {
+	if err := a.init(); err != nil {
+		return
+	}
+	defer a.close()
+
+	a.db.Exec(`DELETE FROM user;`)
+	for _, u := range in {
+		a.SetPasswd(u.name, u.salt, u.verifier)
+		a.db.Query(`UPDATE user SET timestamp = ? WHERE name = ?;`, u.timestamp.Format("2006-01-02 15:04:05"), u.name)
+	}
+}
+
+func (a authSQLite3) Export() ([]user, error) {
+	if err := a.init(); err != nil {
+		return nil, err
+	}
+	defer a.close()
+
+	rows, err := a.db.Query(`SELECT * FROM user;`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var names []string
+	for rows.Next() {
+		var name string
+		if err := rows.Scan(&name); err != nil {
+			return nil, err
+		}
+
+		names = append(names, name)
+	}
+
+	var out []user
+	for _, name := range names {
+		var u user
+		u.timestamp, err = a.Timestamp(name)
+		if err != nil {
+			return nil, err
+		}
+
+		u.salt, u.verifier, err = a.Passwd(name)
+		if err != nil {
+			return nil, err
+		}
+
+		out = append(out, u)
+	}
+
+	return out, nil
+}
+
+func (a authSQLite3) updateTimestamp(name string) {
+	a.db.Exec(`UPDATE user SET timestamp = datetime("now") WHERE name = ?;`, name)
+}
+
+func (a *authSQLite3) init() error {
+	var err error
+	a.db, err = sql.Open("sqlite3", "auth.sqlite")
+	if err != nil {
+		return err
+	}
+
+	init := `CREATE TABLE IF NOT EXISTS user (
+	name VARCHAR(20) PRIMARY KEY NOT NULL,
+	salt BLOB NOT NULL,
+	verifier BLOB NOT NULL,
+	timestamp DATETIME DEFAULT CURRENT_TIMESTAMP);`
+
+	if _, err := a.db.Exec(init); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (a authSQLite3) close() error {
+	return a.db.Close()
+}